MCPOAuthManager (tools/mcp_oauth_manager.py)

Central manager for per-server OAuth state and token reloading.

#!/usr/bin/env python3
# Source: https://github.com/Tommy-yw/RunbookHermes | License: MIT | Copyright 2025 Nous Research
# Provided via justclaw.it.com; keep this notice with the code.
"""Central manager for per-server MCP OAuth state.

One instance shared across the process. Holds per-server OAuth provider
instances and coordinates:

- **Cross-process token reload** via mtime-based disk watch. When an external
  process (e.g. a user cron job) refreshes tokens on disk, the next auth flow
  picks them up without requiring a process restart.
- **401 deduplication** via in-flight futures. When N concurrent tool calls
  all hit 401 with the same access_token, only one recovery attempt fires;
  the rest await the same result.
- **Reconnect signalling** for long-lived MCP sessions. The manager i

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